[R] maptools: Test if point is in polygon

[Monica Pisica]

Hi,
 
You may want to check the package sp. There is one function called "point.in.polygo" that might do what you want.
 
Good luck,
 
Monica
 

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>Message: 32
>Date: Thu, 5 Feb 2009 14:51:36 +0000
>From: baptiste auguie 
>Subject: Re: [R] maptools: Test if point is in polygon
>To: Aleksandr Andreev 
>Cc: "r-help at r-project.org" 
>Message-ID: 
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes
 
>I don't know about the maptools package but one general way to do this 
>would be to compute the convex hull (?chull) of the augmented set of 
>points and test if the point belongs to it.
 
>Hope this helps,
 
>baptiste
 
 
 
>On 5 Feb 2009, at 13:21, Aleksandr Andreev wrote:
 
> In R's maptools package, is there a built-in function to test if a
> given point is "inside" a given polygon on the map? The map was
> loaded from an ESRI Shapefile. The point's latitude and longitude are
> known.
>
> Thank you!
>
> Aleks
>
> --
> ------------------------
> Aleksandr Andreev
> Fulbright Fellow
> Graduate School of Management
> St Petersburg State University